Domino

Reasoning

The excluded domino is number 3 and 3

Reasoning

A standard double-six domino set has 28 unique tiles. The image shows 27 tiles. By listing all the tiles present, the missing tile is [6, 4]. The included tiles are: Doubles: [0, 0], [1, 1], [2, 2], [3, 3], [4, 4], [5, 5], [6, 6]. Others: [0, 1], [0, 3], [0, 4], [0, 5], [0, 6] [1, 2], [1, 3], [1, 4], [1, 5], [1, 6] [2, 3], [2, 4], [2, 5], [2, 6] [3, 4], [3, 5], [3, 6] [4, 5], [4, 6] [5, 6]. Upon checking all possible pairs, the missing tile is [6, 4] (or [4, 6]).

Reasoning

By systematically identifying all 27 dominoes present in the image and comparing them against the complete set of 28 unique tiles in a standard double-six domino set, the missing domino is [4, 4]. All other combinations from [0,0] through [6,6] are accounted for.

Reasoning

Counting the pips on each half of the 27 shown dominoes, the numbers 2 and 6 each occur only six times while every other number 0–6 occurs seven times; therefore the missing domino is [2,6].

Reasoning

The standard double-six set has 28 dominoes. The provided image displays 27 dominoes, arranged in a pattern covering all combinations up to [5-6], omitting the double-six [6-6].

Reasoning

The standard double-six set contains 28 unique dominoes. By examining the image, we identify that all dominoes except [0, 1] are present. The count of appearances for numbers 0 and 1 is reduced by 1 (since [0, 1] contributes one occurrence to each), while other numbers remain at their full count of 8 appearances. This matches the total of 54 dots (27 tiles × 2) in the image.